Yumekui Merry begins with Yumeji Fujiwara, a seemingly average high school student. But ten years ago, Yumeji gained the ability to see the dream auras of other people around him. This ability allows Yumeji to predict what type of dreams people are likely to have next. The dreams of others may not be a mystery to Yumeji, but his own dreams have recently left him puzzled. In dream after dream, Yumeji has been pursued by an army of cats lead by John Doe, who claims he needs Yumeji's body to enter the real world. These strange occurrences get stranger when Yumeji meets Nightmare Merry, a dream demon seeking to return to her own world. Using his powers, Yumeji decides to assist Merry in getting back home. But Merry's very presence in the real world means that the barrier separating dreams and reality has been broken, and not all of the dream demons intend to come to Earth peacefully...

To aid his conquest of Japan, the ruthless lord Daigo Kagemitsu offers to sacrifice his soon-to-be-born son to 48 demons. The demons accept, and the next day, the child is born with several missing limbs and is ruthlessly cast down a river. Fifteen years later, a stubborn young boy named Dororo struggles to survive against hunger and oppressive samurai on the streets of an impoverished and war-torn village. After angering a group of thugs, Dororo is attacked by them, but a mysterious man interrupts them, claiming to hear spirits nearby. Sure enough, a monster emerges from the river, and the man then removes his prosthetic arms, revealing blades hidden underneath, with which he slays the monster before leaving. That night, as the man walks through the forest, Dororo approaches him and declares that he will accompany him. From this, the man, Hyakkimaru, reveals that many of his body parts were stolen by demons and that though he sought a peaceful life, he couldn't escape their relentless onslaught. Despite the tale, Dororo still insists on tagging along. And thus, Hyakkimaru travels through Japan with his new companion and a puppy named Nota, facing the brutality of both hell and mankind. [Written by MAL Rewrite]

Inaba Yuushi's parents died in his first year of middle school, and he moved in with his relatives. Though they did care for him, he could tell he was a burden. After he graduated, he happily prepared to move to a high school with a dormitory. Unfortunately, the dormitory burned to the ground before he could move in! Yuushi doesn't want to live with his grudging relatives, but it's rough finding lodging as an orphaned student with little money. He finally finds a room in a nice old building which seems too good to be true. The catch is that it is a Monster House, a place where humans and supernatural creatures—ghosts, mononoke, etc.—live together. Another high schooler lives there, a cute girl named Akine, and she's completely unfazed by the monsters. In fact, she can even exorcise evil spirits! Yuushi's high school life just got much stranger than he ever bargained for! (Source: MangaHelpers)

Lucy is a special breed of human referred to as "Diclonius," born with a short pair of horns and invisible telekinetic hands that lands her as a victim of inhumane scientific experimentation by the government. However, once circumstances present her an opportunity to escape, Lucy, corrupted by the confinement and torture, unleashes a torrent of bloodshed as she escapes her captors. During her breakout, she receives a crippling head injury that leaves her with a split personality: someone with the mentality of a harmless child possessing limited speech capacity. In this state of instability, she stumbles upon two college students, Kouta and his cousin Yuka, who unknowingly take an injured fugitive into their care, unaware of her murderous tendencies. This act of kindness will change their lives, as they soon find themselves dragged into the shadowy world of government secrecy and conspiracy. [Written by MAL Rewrite]